1 // archive.cc -- archive support for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
29 #include "libiberty.h"
30 #include "filenames.h"
42 #include "incremental.h"
47 // Library_base methods.
49 // Determine whether a definition of SYM_NAME should cause an archive
50 // library member to be included in the link. Returns SHOULD_INCLUDE_YES
51 // if the symbol is referenced but not defined, SHOULD_INCLUDE_NO if the
52 // symbol is already defined, and SHOULD_INCLUDE_UNKNOWN if the symbol is
53 // neither referenced nor defined.
55 Library_base::Should_include
56 Library_base::should_include_member(Symbol_table* symtab, Layout* layout,
57 const char* sym_name, Symbol** symp,
58 std::string* why, char** tmpbufp,
61 // In an object file, and therefore in an archive map, an
62 // '@' in the name separates the symbol name from the
63 // version name. If there are two '@' characters, this is
64 // the default version.
65 char* tmpbuf = *tmpbufp;
66 const char* ver = strchr(sym_name, '@');
70 size_t symlen = ver - sym_name;
71 if (symlen + 1 > *tmpbuflen)
73 tmpbuf = static_cast<char*>(xrealloc(tmpbuf, symlen + 1));
75 *tmpbuflen = symlen + 1;
77 memcpy(tmpbuf, sym_name, symlen);
78 tmpbuf[symlen] = '\0';
89 Symbol* sym = symtab->lookup(sym_name, ver);
93 || !sym->is_undefined()
94 || sym->binding() == elfcpp::STB_WEAK))
95 sym = symtab->lookup(sym_name, NULL);
101 // Check whether the symbol was named in a -u option.
102 if (parameters->options().is_undefined(sym_name))
107 else if (layout->script_options()->is_referenced(sym_name))
109 size_t alc = 100 + strlen(sym_name);
110 char* buf = new char[alc];
111 snprintf(buf, alc, _("script or expression reference to %s"),
116 else if (strcmp(sym_name, parameters->entry()) == 0)
118 *why = "entry symbol ";
122 return Library_base::SHOULD_INCLUDE_UNKNOWN;
124 else if (!sym->is_undefined())
125 return Library_base::SHOULD_INCLUDE_NO;
126 // PR 12001: Do not include an archive when the undefined
127 // symbol has actually been defined on the command line.
128 else if (layout->script_options()->is_pending_assignment(sym_name))
129 return Library_base::SHOULD_INCLUDE_NO;
130 else if (sym->binding() == elfcpp::STB_WEAK)
131 return Library_base::SHOULD_INCLUDE_UNKNOWN;
133 return Library_base::SHOULD_INCLUDE_YES;
136 // The header of an entry in the archive. This is all readable text,
137 // padded with spaces where necessary. If the contents of an archive
138 // are all text file, the entire archive is readable.
140 struct Archive::Archive_header
144 // The file modification time.
146 // The user's UID in decimal.
148 // The user's GID in decimal.
150 // The file mode in octal.
152 // The file size in decimal.
154 // The final magic code.
158 // Class Archive static variables.
159 unsigned int Archive::total_archives;
160 unsigned int Archive::total_members;
161 unsigned int Archive::total_members_loaded;
165 const char Archive::armag[sarmag] =
167 '!', '<', 'a', 'r', 'c', 'h', '>', '\n'
170 const char Archive::armagt[sarmag] =
172 '!', '<', 't', 'h', 'i', 'n', '>', '\n'
175 const char Archive::arfmag[2] = { '`', '\n' };
177 Archive::Archive(const std::string& name, Input_file* input_file,
178 bool is_thin_archive, Dirsearch* dirpath, Task* task)
179 : Library_base(task), name_(name), input_file_(input_file), armap_(),
180 armap_names_(), extended_names_(), armap_checked_(), seen_offsets_(),
181 members_(), is_thin_archive_(is_thin_archive), included_member_(false),
182 nested_archives_(), dirpath_(dirpath), num_members_(0)
185 parameters->options().check_excluded_libs(input_file->found_name());
188 // Set up the archive: read the symbol map and the extended name
194 // We need to ignore empty archives.
195 if (this->input_file_->file().filesize() == sarmag)
198 // The first member of the archive should be the symbol table.
199 std::string armap_name;
200 off_t header_size = this->read_header(sarmag, false, &armap_name, NULL);
201 if (header_size == -1)
204 section_size_type armap_size = convert_to_section_size_type(header_size);
206 if (armap_name.empty())
208 this->read_armap(sarmag + sizeof(Archive_header), armap_size);
209 off = sarmag + sizeof(Archive_header) + armap_size;
211 else if (!this->input_file_->options().whole_archive())
212 gold_error(_("%s: no archive symbol table (run ranlib)"),
213 this->name().c_str());
215 // See if there is an extended name table. We cache these views
216 // because it is likely that we will want to read the following
217 // header in the add_symbols routine.
221 header_size = this->read_header(off, true, &xname, NULL);
222 if (header_size == -1)
225 section_size_type extended_size = convert_to_section_size_type(header_size);
228 const unsigned char* p = this->get_view(off + sizeof(Archive_header),
229 extended_size, false, true);
230 const char* px = reinterpret_cast<const char*>(p);
231 this->extended_names_.assign(px, extended_size);
233 bool preread_syms = (parameters->options().threads()
234 && parameters->options().preread_archive_symbols());
235 #ifndef ENABLE_THREADS
236 preread_syms = false;
238 if (parameters->options().has_plugins())
239 preread_syms = false;
242 this->read_all_symbols();
245 // Unlock any nested archives.
248 Archive::unlock_nested_archives()
250 for (Nested_archive_table::iterator p = this->nested_archives_.begin();
251 p != this->nested_archives_.end();
254 p->second->unlock(this->task_);
258 // Read the archive symbol map.
261 Archive::read_armap(off_t start, section_size_type size)
263 // To count the total number of archive members, we'll just count
264 // the number of times the file offset changes. Since most archives
265 // group the symbols in the armap by object, this ought to give us
266 // an accurate count.
267 off_t last_seen_offset = -1;
269 // Read in the entire armap.
270 const unsigned char* p = this->get_view(start, size, true, false);
272 // Numbers in the armap are always big-endian.
273 const elfcpp::Elf_Word* pword = reinterpret_cast<const elfcpp::Elf_Word*>(p);
274 unsigned int nsyms = elfcpp::Swap<32, true>::readval(pword);
277 // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
278 const char* pnames = reinterpret_cast<const char*>(pword + nsyms);
279 section_size_type names_size =
280 reinterpret_cast<const char*>(p) + size - pnames;
281 this->armap_names_.assign(pnames, names_size);
283 this->armap_.resize(nsyms);
285 section_offset_type name_offset = 0;
286 for (unsigned int i = 0; i < nsyms; ++i)
288 this->armap_[i].name_offset = name_offset;
289 this->armap_[i].file_offset = elfcpp::Swap<32, true>::readval(pword);
290 name_offset += strlen(pnames + name_offset) + 1;
292 if (this->armap_[i].file_offset != last_seen_offset)
294 last_seen_offset = this->armap_[i].file_offset;
295 ++this->num_members_;
299 if (static_cast<section_size_type>(name_offset) > names_size)
300 gold_error(_("%s: bad archive symbol table names"),
301 this->name().c_str());
303 // This array keeps track of which symbols are for archive elements
304 // which we have already included in the link.
305 this->armap_checked_.resize(nsyms);
308 // Read the header of an archive member at OFF. Fail if something
309 // goes wrong. Return the size of the member. Set *PNAME to the name
313 Archive::read_header(off_t off, bool cache, std::string* pname,
316 const unsigned char* p = this->get_view(off, sizeof(Archive_header), true,
318 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(p);
319 return this->interpret_header(hdr, off, pname, nested_off);
322 // Interpret the header of HDR, the header of the archive member at
323 // file offset OFF. Return the size of the member, or -1 if something
324 // has gone wrong. Set *PNAME to the name of the member.
327 Archive::interpret_header(const Archive_header* hdr, off_t off,
328 std::string* pname, off_t* nested_off) const
330 if (memcmp(hdr->ar_fmag, arfmag, sizeof arfmag) != 0)
332 gold_error(_("%s: malformed archive header at %zu"),
333 this->name().c_str(), static_cast<size_t>(off));
337 const int size_string_size = sizeof hdr->ar_size;
338 char size_string[size_string_size + 1];
339 memcpy(size_string, hdr->ar_size, size_string_size);
340 char* ps = size_string + size_string_size;
341 while (ps[-1] == ' ')
347 off_t member_size = strtol(size_string, &end, 10);
350 || (member_size == LONG_MAX && errno == ERANGE))
352 gold_error(_("%s: malformed archive header size at %zu"),
353 this->name().c_str(), static_cast<size_t>(off));
357 if (hdr->ar_name[0] != '/')
359 const char* name_end = strchr(hdr->ar_name, '/');
361 || name_end - hdr->ar_name >= static_cast<int>(sizeof hdr->ar_name))
363 gold_error(_("%s: malformed archive header name at %zu"),
364 this->name().c_str(), static_cast<size_t>(off));
367 pname->assign(hdr->ar_name, name_end - hdr->ar_name);
368 if (nested_off != NULL)
371 else if (hdr->ar_name[1] == ' ')
373 // This is the symbol table.
377 else if (hdr->ar_name[1] == '/')
379 // This is the extended name table.
380 pname->assign(1, '/');
385 long x = strtol(hdr->ar_name + 1, &end, 10);
388 y = strtol(end + 1, &end, 10);
391 || (x == LONG_MAX && errno == ERANGE)
392 || static_cast<size_t>(x) >= this->extended_names_.size())
394 gold_error(_("%s: bad extended name index at %zu"),
395 this->name().c_str(), static_cast<size_t>(off));
399 const char* name = this->extended_names_.data() + x;
400 const char* name_end = strchr(name, '\n');
401 if (static_cast<size_t>(name_end - name) > this->extended_names_.size()
402 || name_end[-1] != '/')
404 gold_error(_("%s: bad extended name entry at header %zu"),
405 this->name().c_str(), static_cast<size_t>(off));
408 pname->assign(name, name_end - 1 - name);
409 if (nested_off != NULL)
416 // An archive member iterator.
418 class Archive::const_iterator
421 // The header of an archive member. This is what this iterator
425 // The name of the member.
427 // The file offset of the member.
429 // The file offset of a nested archive member.
431 // The size of the member.
435 const_iterator(Archive* archive, off_t off)
436 : archive_(archive), off_(off)
437 { this->read_next_header(); }
441 { return this->header_; }
445 { return &this->header_; }
450 if (this->off_ == this->archive_->file().filesize())
452 this->off_ += sizeof(Archive_header);
453 if (!this->archive_->is_thin_archive())
454 this->off_ += this->header_.size;
455 if ((this->off_ & 1) != 0)
457 this->read_next_header();
464 const_iterator ret = *this;
470 operator==(const const_iterator p) const
471 { return this->off_ == p->off; }
474 operator!=(const const_iterator p) const
475 { return this->off_ != p->off; }
481 // The underlying archive.
483 // The current offset in the file.
485 // The current archive header.
489 // Read the next archive header.
492 Archive::const_iterator::read_next_header()
494 off_t filesize = this->archive_->file().filesize();
497 if (filesize - this->off_ < static_cast<off_t>(sizeof(Archive_header)))
499 if (filesize != this->off_)
501 gold_error(_("%s: short archive header at %zu"),
502 this->archive_->filename().c_str(),
503 static_cast<size_t>(this->off_));
504 this->off_ = filesize;
506 this->header_.off = filesize;
510 unsigned char buf[sizeof(Archive_header)];
511 this->archive_->file().read(this->off_, sizeof(Archive_header), buf);
513 const Archive_header* hdr = reinterpret_cast<const Archive_header*>(buf);
514 off_t size = this->archive_->interpret_header(hdr, this->off_,
516 &this->header_.nested_off);
519 this->header_.off = filesize;
523 this->header_.size = size;
524 this->header_.off = this->off_;
526 // Skip special members.
527 if (!this->header_.name.empty() && this->header_.name != "/")
530 this->off_ += sizeof(Archive_header) + this->header_.size;
531 if ((this->off_ & 1) != 0)
538 Archive::const_iterator
541 return Archive::const_iterator(this, sarmag);
546 Archive::const_iterator
549 return Archive::const_iterator(this, this->input_file_->file().filesize());
552 // Get the file and offset for an archive member, which may be an
553 // external member of a thin archive. Set *INPUT_FILE to the
554 // file containing the actual member, *MEMOFF to the offset
555 // within that file (0 if not a nested archive), and *MEMBER_NAME
556 // to the name of the archive member. Return TRUE on success.
559 Archive::get_file_and_offset(off_t off, Input_file** input_file, off_t* memoff,
560 off_t* memsize, std::string* member_name)
564 *memsize = this->read_header(off, false, member_name, &nested_off);
568 *input_file = this->input_file_;
569 *memoff = off + static_cast<off_t>(sizeof(Archive_header));
571 if (!this->is_thin_archive_)
574 // Adjust a relative pathname so that it is relative
575 // to the directory containing the archive.
576 if (!IS_ABSOLUTE_PATH(member_name->c_str()))
578 const char* arch_path = this->filename().c_str();
579 const char* basename = lbasename(arch_path);
580 if (basename > arch_path)
581 member_name->replace(0, 0,
582 this->filename().substr(0, basename - arch_path));
587 // This is a member of a nested archive. Open the containing
588 // archive if we don't already have it open, then do a recursive
589 // call to include the member from that archive.
591 Nested_archive_table::const_iterator p =
592 this->nested_archives_.find(*member_name);
593 if (p != this->nested_archives_.end())
597 Input_file_argument* input_file_arg =
598 new Input_file_argument(member_name->c_str(),
599 Input_file_argument::INPUT_FILE_TYPE_FILE,
600 "", false, parameters->options());
601 *input_file = new Input_file(input_file_arg);
603 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
605 arch = new Archive(*member_name, *input_file, false, this->dirpath_,
608 std::pair<Nested_archive_table::iterator, bool> ins =
609 this->nested_archives_.insert(std::make_pair(*member_name, arch));
610 gold_assert(ins.second);
612 return arch->get_file_and_offset(nested_off, input_file, memoff,
613 memsize, member_name);
616 // This is an external member of a thin archive. Open the
617 // file as a regular relocatable object file.
618 Input_file_argument* input_file_arg =
619 new Input_file_argument(member_name->c_str(),
620 Input_file_argument::INPUT_FILE_TYPE_FILE,
621 "", false, this->input_file_->options());
622 *input_file = new Input_file(input_file_arg);
624 if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
628 *memsize = (*input_file)->file().filesize();
632 // Return an ELF object for the member at offset OFF. If
633 // PUNCONFIGURED is not NULL, then if the ELF object has an
634 // unsupported target type, set *PUNCONFIGURED to true and return
638 Archive::get_elf_object_for_member(off_t off, bool* punconfigured)
640 if (punconfigured != NULL)
641 *punconfigured = false;
643 Input_file* input_file;
646 std::string member_name;
647 if (!this->get_file_and_offset(off, &input_file, &memoff, &memsize,
651 if (parameters->options().has_plugins())
653 Object* obj = parameters->options().plugins()->claim_file(input_file,
658 // The input file was claimed by a plugin, and its symbols
659 // have been provided by the plugin.
664 const unsigned char* ehdr;
666 if (!is_elf_object(input_file, memoff, &ehdr, &read_size))
668 gold_error(_("%s: member at %zu is not an ELF object"),
669 this->name().c_str(), static_cast<size_t>(off));
673 Object* obj = make_elf_object((std::string(this->input_file_->filename())
674 + "(" + member_name + ")"),
675 input_file, memoff, ehdr, read_size,
679 obj->set_no_export(this->no_export());
683 // Read the symbols from all the archive members in the link.
686 Archive::read_all_symbols()
688 for (Archive::const_iterator p = this->begin();
691 this->read_symbols(p->off);
694 // Read the symbols from an archive member in the link. OFF is the file
695 // offset of the member header.
698 Archive::read_symbols(off_t off)
700 Object* obj = this->get_elf_object_for_member(off, NULL);
704 Read_symbols_data* sd = new Read_symbols_data;
705 obj->read_symbols(sd);
706 Archive_member member(obj, sd);
707 this->members_[off] = member;
710 // Select members from the archive and add them to the link. We walk
711 // through the elements in the archive map, and look each one up in
712 // the symbol table. If it exists as a strong undefined symbol, we
713 // pull in the corresponding element. We have to do this in a loop,
714 // since pulling in one element may create new undefined symbols which
715 // may be satisfied by other objects in the archive. Return true in
716 // the normal case, false if the first member we tried to add from
717 // this archive had an incompatible target.
720 Archive::add_symbols(Symbol_table* symtab, Layout* layout,
721 Input_objects* input_objects, Mapfile* mapfile)
723 ++Archive::total_archives;
725 if (this->input_file_->options().whole_archive())
726 return this->include_all_members(symtab, layout, input_objects,
729 Archive::total_members += this->num_members_;
731 input_objects->archive_start(this);
733 const size_t armap_size = this->armap_.size();
735 // This is a quick optimization, since we usually see many symbols
736 // in a row with the same offset. last_seen_offset holds the last
737 // offset we saw that was present in the seen_offsets_ set.
738 off_t last_seen_offset = -1;
740 // Track which symbols in the symbol table we've already found to be
744 size_t tmpbuflen = 0;
745 bool added_new_object;
748 added_new_object = false;
749 for (size_t i = 0; i < armap_size; ++i)
751 if (this->armap_checked_[i])
753 if (this->armap_[i].file_offset == last_seen_offset)
755 this->armap_checked_[i] = true;
758 if (this->seen_offsets_.find(this->armap_[i].file_offset)
759 != this->seen_offsets_.end())
761 this->armap_checked_[i] = true;
762 last_seen_offset = this->armap_[i].file_offset;
766 const char* sym_name = (this->armap_names_.data()
767 + this->armap_[i].name_offset);
771 Archive::Should_include t =
772 Archive::should_include_member(symtab, layout, sym_name, &sym,
773 &why, &tmpbuf, &tmpbuflen);
775 if (t == Archive::SHOULD_INCLUDE_NO
776 || t == Archive::SHOULD_INCLUDE_YES)
777 this->armap_checked_[i] = true;
779 if (t != Archive::SHOULD_INCLUDE_YES)
782 // We want to include this object in the link.
783 last_seen_offset = this->armap_[i].file_offset;
784 this->seen_offsets_.insert(last_seen_offset);
786 if (!this->include_member(symtab, layout, input_objects,
787 last_seen_offset, mapfile, sym,
795 added_new_object = true;
798 while (added_new_object);
803 input_objects->archive_stop(this);
808 // Return whether the archive includes a member which defines the
812 Archive::defines_symbol(Symbol* sym) const
814 const char* symname = sym->name();
815 size_t symname_len = strlen(symname);
816 size_t armap_size = this->armap_.size();
817 for (size_t i = 0; i < armap_size; ++i)
819 if (this->armap_checked_[i])
821 const char* archive_symname = (this->armap_names_.data()
822 + this->armap_[i].name_offset);
823 if (strncmp(archive_symname, symname, symname_len) != 0)
825 char c = archive_symname[symname_len];
826 if (c == '\0' && sym->version() == NULL)
830 const char* ver = archive_symname + symname_len + 1;
833 if (sym->version() == NULL)
837 if (sym->version() != NULL && strcmp(sym->version(), ver) == 0)
844 // Include all the archive members in the link. This is for --whole-archive.
847 Archive::include_all_members(Symbol_table* symtab, Layout* layout,
848 Input_objects* input_objects, Mapfile* mapfile)
850 input_objects->archive_start(this);
852 if (this->members_.size() > 0)
854 std::map<off_t, Archive_member>::const_iterator p;
855 for (p = this->members_.begin();
856 p != this->members_.end();
859 if (!this->include_member(symtab, layout, input_objects, p->first,
860 mapfile, NULL, "--whole-archive"))
862 ++Archive::total_members;
867 for (Archive::const_iterator p = this->begin();
871 if (!this->include_member(symtab, layout, input_objects, p->off,
872 mapfile, NULL, "--whole-archive"))
874 ++Archive::total_members;
878 input_objects->archive_stop(this);
883 // Return the number of members in the archive. This is only used for
887 Archive::count_members()
890 for (Archive::const_iterator p = this->begin();
897 // Include an archive member in the link. OFF is the file offset of
898 // the member header. WHY is the reason we are including this member.
899 // Return true if we added the member or if we had an error, return
900 // false if this was the first member we tried to add from this
901 // archive and it had an incompatible format.
904 Archive::include_member(Symbol_table* symtab, Layout* layout,
905 Input_objects* input_objects, off_t off,
906 Mapfile* mapfile, Symbol* sym, const char* why)
908 ++Archive::total_members_loaded;
910 std::map<off_t, Archive_member>::const_iterator p = this->members_.find(off);
911 if (p != this->members_.end())
913 Object* obj = p->second.obj_;
915 Read_symbols_data* sd = p->second.sd_;
917 mapfile->report_include_archive_member(obj->name(), sym, why);
918 if (input_objects->add_object(obj))
920 obj->layout(symtab, layout, sd);
921 obj->add_symbols(symtab, sd, layout);
922 this->included_member_ = true;
928 // If this is the first object we are including from this archive,
929 // and we searched for this archive, most likely because it was
930 // found via a -l option, then if the target is incompatible we want
931 // to move on to the next archive found in the search path.
932 bool unconfigured = false;
933 bool* punconfigured = NULL;
934 if (!this->included_member_ && this->searched_for())
935 punconfigured = &unconfigured;
937 Object* obj = this->get_elf_object_for_member(off, punconfigured);
940 // Return false to search for another archive, true if we found
942 return unconfigured ? false : true;
946 mapfile->report_include_archive_member(obj->name(), sym, why);
948 Pluginobj* pluginobj = obj->pluginobj();
949 if (pluginobj != NULL)
951 pluginobj->add_symbols(symtab, NULL, layout);
952 this->included_member_ = true;
956 if (!input_objects->add_object(obj))
958 // If this is an external member of a thin archive, unlock the
960 if (obj->offset() == 0)
961 obj->unlock(this->task_);
967 if (layout->incremental_inputs() != NULL)
968 layout->incremental_inputs()->report_object(obj, 0, this, NULL);
969 Read_symbols_data sd;
970 obj->read_symbols(&sd);
971 obj->layout(symtab, layout, &sd);
972 obj->add_symbols(symtab, &sd, layout);
975 // If this is an external member of a thin archive, unlock the file
976 // for the next task.
977 if (obj->offset() == 0)
978 obj->unlock(this->task_);
980 this->included_member_ = true;
986 // Iterate over all unused symbols, and call the visitor class V for each.
989 Archive::do_for_all_unused_symbols(Symbol_visitor_base* v) const
991 for (std::vector<Armap_entry>::const_iterator p = this->armap_.begin();
992 p != this->armap_.end();
995 if (this->seen_offsets_.find(p->file_offset)
996 == this->seen_offsets_.end())
997 v->visit(this->armap_names_.data() + p->name_offset);
1001 // Print statistical information to stderr. This is used for --stats.
1004 Archive::print_stats()
1006 fprintf(stderr, _("%s: archive libraries: %u\n"),
1007 program_name, Archive::total_archives);
1008 fprintf(stderr, _("%s: total archive members: %u\n"),
1009 program_name, Archive::total_members);
1010 fprintf(stderr, _("%s: loaded archive members: %u\n"),
1011 program_name, Archive::total_members_loaded);
1014 // Add_archive_symbols methods.
1016 Add_archive_symbols::~Add_archive_symbols()
1018 if (this->this_blocker_ != NULL)
1019 delete this->this_blocker_;
1020 // next_blocker_ is deleted by the task associated with the next
1024 // Return whether we can add the archive symbols. We are blocked by
1025 // this_blocker_. We block next_blocker_. We also lock the file.
1028 Add_archive_symbols::is_runnable()
1030 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1031 return this->this_blocker_;
1036 Add_archive_symbols::locks(Task_locker* tl)
1038 tl->add(this, this->next_blocker_);
1039 tl->add(this, this->archive_->token());
1043 Add_archive_symbols::run(Workqueue* workqueue)
1045 // For an incremental link, begin recording layout information.
1046 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
1047 if (incremental_inputs != NULL)
1049 unsigned int arg_serial = this->input_argument_->file().arg_serial();
1050 Script_info* script_info = this->input_argument_->script_info();
1051 incremental_inputs->report_archive_begin(this->archive_, arg_serial,
1055 bool added = this->archive_->add_symbols(this->symtab_, this->layout_,
1056 this->input_objects_,
1058 this->archive_->unlock_nested_archives();
1060 this->archive_->release();
1061 this->archive_->clear_uncached_views();
1065 // This archive holds object files which are incompatible with
1067 Read_symbols::incompatible_warning(this->input_argument_,
1068 this->archive_->input_file());
1069 Read_symbols::requeue(workqueue, this->input_objects_, this->symtab_,
1070 this->layout_, this->dirpath_, this->dirindex_,
1071 this->mapfile_, this->input_argument_,
1072 this->input_group_, this->next_blocker_);
1073 delete this->archive_;
1077 if (this->input_group_ != NULL)
1078 this->input_group_->add_archive(this->archive_);
1081 // For an incremental link, finish recording the layout information.
1082 if (incremental_inputs != NULL)
1083 incremental_inputs->report_archive_end(this->archive_);
1085 if (!parameters->options().has_plugins()
1086 || this->archive_->input_file()->options().whole_archive())
1088 // We no longer need to know about this archive.
1089 delete this->archive_;
1093 // The plugin interface may want to rescan this archive.
1094 parameters->options().plugins()->save_archive(this->archive_);
1097 this->archive_ = NULL;
1101 // Class Lib_group static variables.
1102 unsigned int Lib_group::total_lib_groups;
1103 unsigned int Lib_group::total_members;
1104 unsigned int Lib_group::total_members_loaded;
1106 Lib_group::Lib_group(const Input_file_lib* lib, Task* task)
1107 : Library_base(task), lib_(lib), members_()
1109 this->members_.resize(lib->size());
1113 Lib_group::do_filename() const
1115 std::string *filename = new std::string("/group/");
1119 // Select members from the lib group and add them to the link. We walk
1120 // through the members, and check if each one up should be included.
1121 // If the object says it should be included, we do so. We have to do
1122 // this in a loop, since including one member may create new undefined
1123 // symbols which may be satisfied by other members.
1126 Lib_group::add_symbols(Symbol_table* symtab, Layout* layout,
1127 Input_objects* input_objects)
1129 ++Lib_group::total_lib_groups;
1131 Lib_group::total_members += this->members_.size();
1133 bool added_new_object;
1136 added_new_object = false;
1138 while (i < this->members_.size())
1140 const Archive_member& member = this->members_[i];
1141 Object* obj = member.obj_;
1144 // Skip files with no symbols. Plugin objects have
1145 // member.sd_ == NULL.
1147 && (member.sd_ == NULL || member.sd_->symbol_names != NULL))
1149 Archive::Should_include t = obj->should_include_member(symtab,
1154 if (t != Archive::SHOULD_INCLUDE_YES)
1160 this->include_member(symtab, layout, input_objects, member);
1162 added_new_object = true;
1166 if (member.sd_ != NULL)
1168 // The file must be locked in order to destroy the views
1169 // associated with it.
1170 gold_assert(obj != NULL);
1171 obj->lock(this->task_);
1173 obj->unlock(this->task_);
1177 this->members_[i] = this->members_.back();
1178 this->members_.pop_back();
1181 while (added_new_object);
1184 // Include a lib group member in the link.
1187 Lib_group::include_member(Symbol_table* symtab, Layout* layout,
1188 Input_objects* input_objects,
1189 const Archive_member& member)
1191 ++Lib_group::total_members_loaded;
1193 Object* obj = member.obj_;
1194 gold_assert(obj != NULL);
1196 Pluginobj* pluginobj = obj->pluginobj();
1197 if (pluginobj != NULL)
1199 pluginobj->add_symbols(symtab, NULL, layout);
1203 Read_symbols_data* sd = member.sd_;
1204 gold_assert(sd != NULL);
1205 obj->lock(this->task_);
1206 if (input_objects->add_object(obj))
1208 if (layout->incremental_inputs() != NULL)
1209 layout->incremental_inputs()->report_object(obj, member.arg_serial_,
1211 obj->layout(symtab, layout, sd);
1212 obj->add_symbols(symtab, sd, layout);
1215 // Unlock the file for the next task.
1216 obj->unlock(this->task_);
1219 // Iterate over all unused symbols, and call the visitor class V for each.
1222 Lib_group::do_for_all_unused_symbols(Symbol_visitor_base* v) const
1224 // Files are removed from the members list when used, so all the
1225 // files remaining on the list are unused.
1226 for (std::vector<Archive_member>::const_iterator p = this->members_.begin();
1227 p != this->members_.end();
1230 Object* obj = p->obj_;
1231 obj->for_all_global_symbols(p->sd_, v);
1235 // Print statistical information to stderr. This is used for --stats.
1238 Lib_group::print_stats()
1240 fprintf(stderr, _("%s: lib groups: %u\n"),
1241 program_name, Lib_group::total_lib_groups);
1242 fprintf(stderr, _("%s: total lib groups members: %u\n"),
1243 program_name, Lib_group::total_members);
1244 fprintf(stderr, _("%s: loaded lib groups members: %u\n"),
1245 program_name, Lib_group::total_members_loaded);
1249 Add_lib_group_symbols::is_runnable()
1251 if (this->readsyms_blocker_ != NULL && this->readsyms_blocker_->is_blocked())
1252 return this->readsyms_blocker_;
1253 if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
1254 return this->this_blocker_;
1259 Add_lib_group_symbols::locks(Task_locker* tl)
1261 tl->add(this, this->next_blocker_);
1265 Add_lib_group_symbols::run(Workqueue*)
1267 // For an incremental link, begin recording layout information.
1268 Incremental_inputs* incremental_inputs = this->layout_->incremental_inputs();
1269 if (incremental_inputs != NULL)
1270 incremental_inputs->report_archive_begin(this->lib_, 0, NULL);
1272 this->lib_->add_symbols(this->symtab_, this->layout_, this->input_objects_);
1274 if (incremental_inputs != NULL)
1275 incremental_inputs->report_archive_end(this->lib_);
1278 Add_lib_group_symbols::~Add_lib_group_symbols()
1280 if (this->this_blocker_ != NULL)
1281 delete this->this_blocker_;
1282 // next_blocker_ is deleted by the task associated with the next
1286 } // End namespace gold.